Large and tunable photothermoelectric effect in single-layer MoS2.

By M. Buscema, Maria Barkelid, V. Zwiller, Herre S. J. van der Zant, G. Steele, A. Castellanos-Gómez. Nano letters (Print), 2013

607 citations recorded by the source corpus.

We study the photoresponse of single-layer MoS(2) field-effect transistors by scanning photocurrent microscopy. We find that, unlike in many other semiconductors, the photocurrent generation in single-layer MoS(2) is dominated by the photothermoelectric effect and not by the separation of photoexcited electron-hole pairs across the Schottky barriers at the MoS(2)/electrode interfaces. We observe a large value for the Seebeck coefficient for single-layer MoS(2) that by an external electric field can be tuned between -4 × 10(2) and -1 × 10(5) μV K(-1). This large and tunable Seebeck coefficient of the single-layer MoS(2) paves the way to new applications of this material such as on-chip thermopower generation and waste thermal energy harvesting.

Subfields: Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/dcf63abd9b52eb9bd57edf84b97c6ffa120b1937

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In Materials Chemistry

  1. A. Castellanos-Gómez
  2. G. Steele
  3. Herre S. J. van der Zant
  4. M. Buscema
  5. E. Malic
  6. Thomas Mueller
  7. Qing Zhang
  8. R. Ganatra

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